TY - JOUR T1 - Thermal Performance Investigation of Plain Finned-Tube Evaporators Used in Household Refrigerator TT - Evsel Bir Buzdolabında Kullanılan Düz Kanatlı Borulu Buharlaştırıcıların Isıl Performanslarının İncelenmesi AU - Atici, Omer Alp AU - Çadırcı, Sertaç AU - Apaydın, Tolga PY - 2020 DA - May DO - 10.21205/deufmd.2020226515 JF - Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi JO - DEUFMD PB - Dokuz Eylül Üniversitesi WT - DergiPark SN - 1302-9304 SP - 457 EP - 468 VL - 22 IS - 65 LA - en AB - In this study, thermal performance of plain finned-tubeevaporators in household refrigerators are investigated numerically andexperimentally. The design parameters affecting on the cooling capacity aredetermined as air flowrate, evaporator temperature, tube alignment, number of tubesand number of fins. In the initial stage, the effects of those parameters onthe cooling capacities are simulated by CoilDesigner software. The number ofexperiments that are necessary to obtain correlations is determined by Minitabsoftware. The experiments are carried out in a no-frost household refrigeratorin the off-mode. At the end of each experiment, air side heat transfercoefficients are calculated to generate a Nusselt (Nu) correlation as afunction of the mentioned design parameters. The generated correlation of the coolingcapacity can predict 95% of the experimental results within a confidence rangeof 15%. The correlation of the coolingcapacity is converted to the Nusselt number correlation which is found to beconsistent with available data in literature. The experiments reveal that thecooling capacity is dominantly affected by the evaporator temperature followedby air flow rate, tube alignment, number of tubes and the number of fins. KW - Plain Finned Tube Evaporator KW - Cooling Capacity KW - Design of Experiments KW - Nusselt Number Correlation KW - Numerical Model N2 - Bu çalışmada, düz kanatlı borulu buharlaştırıcıların ev tipi buzdolaplarındaki ısıl performansı sayısal ve deneysel olarak incelenmiştir. Soğutma kapasitesini etkileyen tasarım parametreleri, hava debisi, buharlaştırıcı sıcaklığı, boru düzeni, boru sayısı ve kanat sayısı olarak belirlenmiştir. İlk aşamada, bu parametrelerin soğutma kapasiteleri üzerindeki etkileri CoilDesigner yazılımı ile modellenmiştir. Isıl inceleme için gerekli olan deneylerin sayısı Minitab yazılımı tarafından simülasyon sonuçlarına göre belirlenmiştir. Deneyler ev tipi bir buzdolabında kapalı soğutma çevrimi olmaksızın yapılmıştır. Her deneyin sonunda hava tarafı ısı transfer katsayıları, söz konusu tasarım parametrelerinin bir fonksiyonu olarak ve Nusselt (Nu) korelasyonu oluşturmak için hesaplanır. 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